Lua, handlers, and triggers

Put Lua in named <handler> elements and reusable snippets in named <library> elements. CDATA preserves the source exactly. The optional <on-message> entry point handles cloud invocation. Handler and library names are unique.

Triggers connect an event or schedule to a handler. Cron triggers declare a schedule. Tail and file-watch triggers declare paths, with an optional pattern for file-created and file-deleted events. Every trigger must name an existing handler. Validation checks Lua syntax and references to the resources declared in this definition.

This example is rejected because a route names a handler the definition does not provide.

<edge-app format="1" handle="invalid-handler" name="Invalid handler">
  <http-routes>
    <route method="post" path="/events" handler="missing">
      <auth mode="none"/>
    </route>
  </http-routes>
</edge-app>